6 files changed, 830 insertions, 5 deletions
diff --git a/TODO b/TODO
index 81f05087..ee52b38f 100644
--- a/TODO
+++ b/TODO
@@ -43,11 +43,6 @@
    (http://delphi.about.com). .. use at your own risk and for whatever
    the purpose you want .. no support provided. Sample code provided."
 
- * R = 4, V = 4 encryption.
-
-    - Update C API for R4 encryption
-
-
 
 2.2
 ===
diff --git a/qpdf/qtest/qpdf.test b/qpdf/qtest/qpdf.test
index 3e425254..f1f2cc53 100644
--- a/qpdf/qtest/qpdf.test
+++ b/qpdf/qtest/qpdf.test
@@ -1078,6 +1078,23 @@ $td->runtest("make sure there is no xref stream",
 	     {$td->REGEXP => "\\s*0\\s*", $td->EXIT_STATUS => 0},
 	     $td->NORMALIZE_NEWLINES);
 
+# Look at some actual V4 files
+$n_tests += 8;
+foreach my $d (['--force-V4', 'V4'],
+	       ['--cleartext-metadata', 'V4-clearmeta'],
+	       ['--use-aes=y', 'V4-aes'],
+	       ['--cleartext-metadata --use-aes=y', 'V4-aes-clearmeta'])
+{
+    my ($args, $out) = @$d;
+    $td->runtest("encrypt $args",
+		 {$td->COMMAND => "qpdf --static-aes-iv --static-id" .
+		      " --encrypt '' '' 128 $args -- enc-base.pdf a.pdf"},
+		 {$td->STRING => "", $td->EXIT_STATUS => 0});
+    $td->runtest("check output",
+		 {$td->FILE => "a.pdf"},
+		 {$td->FILE => "$out.pdf"});
+}
+
 show_ntests();
 # ----------
 $td->notify("--- Content Preservation Tests ---");
diff --git a/qpdf/qtest/qpdf/V4-aes-clearmeta.pdf b/qpdf/qtest/qpdf/V4-aes-clearmeta.pdf
new file mode 100644
index 00000000..61c57f5c
--- /dev/null
+++ b/qpdf/qtest/qpdf/V4-aes-clearmeta.pdf
@@ -0,0 +1,417 @@
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diff --git a/qpdf/qtest/qpdf/V4-clearmeta.pdf b/qpdf/qtest/qpdf/V4-clearmeta.pdf
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diff --git a/qpdf/qtest/qpdf/V4.pdf b/qpdf/qtest/qpdf/V4.pdf
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